368 



REVISION OF THE TKNEBRIONIDyE OF AMERICA, 



Above each eye in this insect is a rather small tubercle, similar to that seen in our 

 species of Ulosonia ?. The frontal suture is also similarly impressed and the epistoma 

 convex. One specimen is known, of similar derivation as that of the preceding genus. 



M. angustus, brownish ferruginous, moderately shining, elongate oval, parallel. Head rather coarsely but 

 sparsely punctured. Thorax slightly broader than long, feebly convex, coarsely but sparsely and irregularly punc- 

 tured; apex emarginate, angles not prominent; base Insinuate, angles rectangular; sides anteriorly rounded, posterior 

 three-fourths straight and parallel, finely margined, margin slightly rellexed. Elytra elongate, parallel, apex ..Muse, 

 base emarginate at middle, with eight stlte of elongate punctures, one marginal and a very indistinct seutellar stria; 

 Interstices Hat, finely and sparsely punotured. Propteurse coarsely hut sparsely punctured, pectus and abdomen finely 

 and sparsely punotured, smooth and shining. 



Length .lfi-.20 inch. 



(lamp Grant, Arizona, under Cottonwood bark. 



The male is narrower but smaller than the female, and the frontal tubercles distinct, 

 though less prominent than in the preceding species. The base of the thorax has also a, 

 distinct impression on each side, scarcely evident in the; female. This species differs from 

 the preceding in its more elongate and less depressed form, its color and the form of the 

 thorax. In picew the thorax gradually narrows from base to apex, in anguatua the thorax 

 is rounded only in front, while the posterior three-fourths are straight and parallel. 



AIMIANOTUS, Leo. 



Aphanotus, Lee, Gen. Col. N. A., p. 888. 



In addition to the characters given in the synoptic table, tin; following will serve to 

 render this genus more certain of recognition, when all the foreign genera of the tribe arc 

 taken into consideration. 



Epistoma truncate in front, convex at middle, slightly concave on tin; sides, suture in- 

 distinct. Eyes very dec-ply emarginate in front, superior portion elongate, oblique. An- 

 tenna short, rather robust ; first and second joints thicker than the third; second short, 

 nearly globular; third slightly longer than fourth; joints four to eleven very gradually 

 broader, last joint larger and truncate at tip. The hind tarsi are short, first joint equal 

 to the two intermediate, and last joint slightly longer than the first, Interooxal process 

 rounded at tip. 



A. brevicomis, Lee, (Eulabis) Proc. Acad. 185!), p. 78. 



The head and thorax are coarsely, the latter rather densely punctured. The elytra 

 an; sculptured with rows of faintly impressed punctures, the interstices of which are fiat 

 except at middle, where they form a moderately elevated fine" line. 



Length .25 inch. 

 From California. 



